WOODWARD : FOSSIL FISHES OF THE UPPER LIAS OF WHITBY. 
33 
Family EuGNATHiDiE. 
EuGNATHUS FASCicuLATUS, Agassiz, MS. 
Plate III., fi^s. 6, 7- 
1844. Eiignathus fasciculatus, L. Agassiz, Poiss. Foss. vol. ii., pt. ii., 
p. 105 (name only). 
Type : Specifically indeterminable remains ; British Museum. 
The genus Eugnathus has already been recorded from the 
W^hitby Lias by Agassiz, but he gives no information as to the nature 
of the specimens. Eugnathus fasciculatus is merely mentioned as a 
Whitby species, to be described in a forthcoming supplement, which 
unfortunately never appeared. 
This record is based on two specimens in the collections of the 
late Sir Philip Egerton and the late Earl of Euniskillen, now in the 
British Museum, both bearing the specific name " fasciculatus," 
written by Agassiz himself on the label. Both the fossils, however, 
are much too imperfect for specific determination ; and as no better 
examples appear to have been hitherto discovered, it must suffice to 
describe them merely under the name they bear, without attempting 
any specific diagnosis. 
The first specimen in the Egerton collection (Brit. Mus., No. 
P. 508) is marked as the type, and probably represents a fish not less 
than 0'35m. or 0'4m. in length ; but only part of the squamation 
is preserved with other indeterminable fragments on a much-broken 
slab of shale. The scales seem to belong to the middle region of the 
trunk, none deeper than broad, but nearly all considerably broader 
than deep. When well preserved the exposed portion of each scale 
is shown to be ornamented with the radiating ridges and pectinations 
characteristic of the genus ; and all the ridges are very sharp, as 
shown in the three scales represented in pi. iii., fig. 7. The dorsal 
and ventral scales are, as usual, excessively broad in proportion to 
their depth. 
The second specimen labelled by Agassiz cannot have attained a 
greater length than 0*15m., and is preserved in counterpart, one side 
having been obtained from the Enniskillen collection (Brit. Mus., 
No. P. 4468), the other from the Egerton collection (Brit. Mus., 
No. P. 8 7 3), The scales are much less conspicuously ornamented 
